CET timezone in @ notifications

Hi,

I am affraid I do not understand Your advice. Synology NAS and docker container are running with CET zone.

Synology NAS:

root@NAS01:~# date
Mon Jan 18 09:22:16 CET 2021

checkmk docker terminal:

root@checkmk-check-mk-raw2:/# date
Mon Jan 18 09:27:44 CET 2021

Timezone set with container variables:

Bez tytułu

What shall I change more ?

Below notification example:

Bez tytułu